DNA has a double helical structure. What purpose does this structure serve?

Explanation

**Step-by-Step Solution:**

1. **Understanding DNA Structure**: DNA, or deoxyribonucleic acid, is a molecule that carries genetic information. Its structure is described as double helical, meaning it consists of two strands that twist around each other.

2. **Components of DNA**: The DNA molecule is made up of three main components:
- **Pentose Sugar**: This is a five-carbon sugar that forms part of the backbone of the DNA.
- **Phosphate Group**: This group also forms part of the backbone and is hydrophilic (water-attracting).
- **Nitrogenous Bases**: These are the building blocks of genetic information and include adenine (A), thymine (T), guanine (G), and cytosine (C). The bases are hydrophobic (water-repelling).
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